Sony Ericsson X1 has several design defects. The most notable is the fact that the Bluetooth switches off automatically in order to save power. You cannot configure it NOT to do it! Therefore, if someone needs to use the phone frequently on hands free using bluetooth, forget it, now and then the bluetooth will swith off and one cannot any longer use the phone hands free. I contacted Sony Ericsson via email and then followed up with a call. Their uninterested response was the same: "It's a design feature for the customers'... read full review »